Supplier-catalogue component comparison; no independent fit or performance test.
PHPFLUID A4VG56 replacement charge pumps
The original catalogue lists four A4VG56 replacement configurations. All show Z21 at the front; the rear is blank, Z9, Z13 or Z14 depending on the PHP code. Tooth counts alone do not prove a match.
Four codes, four rear arrangements
Keep the PHP part code beside both coupler columns.
The supplier’s original charge-pump table lists these four A4VG56 rows. Its “No Tandem pump” and “Tandem pump” descriptions are reproduced as catalogue classifications, not interpreted as a complete specification of the installed main pump. [1]
| PHP code | Catalogue arrangement | Front teeth | Rear teeth |
|---|---|---|---|
| PCPA4VG56-F00 | No Tandem pump | Z21 | Blank in original table |
| PCPA4VG56-F01 | Tandem pump | Z21 | Z9 |
| PCPA4VG56-F02 | Tandem pump | Z21 | Z13 |
| PCPA4VG56-F07 | Tandem pump | Z21 | Z14 |
The blank rear entry for F00 is not a published zero-tooth dimension. Confirm the actual assembly drawing and included parts. The original range photograph shows several assemblies and loose components; none is identified by one of these four codes. It must not be used to approve an exact configuration.
PHPFLUID states that it manufactures these charge pumps to replace Rexroth-pattern components. This is not an original Bosch Rexroth offer or evidence of OEM authorisation. The supplier’s universal interchangeability claim still requires an order-specific match.
Equal tooth counts are only one check
Resolve geometry and pump configuration before releasing the order.
Z21 with Z13 points to the F02 catalogue row, but it does not by itself establish compatible spline form, diameter, engagement, mounting or operating arrangement. No dimensioned PHP A4VG56 drawing was supplied in the reviewed listing. Ask for a controlled drawing rather than estimating dimensions from the image.
Installed assembly evidence
- Complete main-pump type code, series, material number and nameplate.
- Old component marking and clear front/rear photographs.
- Existing tandem/through-drive arrangement and relevant service drawing.
Proposed replacement evidence
- Exact PHP code and drawing revision.
- Spline geometry, mating engagement and mounting dimensions.
- Written cross-reference and explicitly unresolved differences.
The original Rexroth series 32 data sheet codes the boost-pump and through-drive arrangements separately. [2] Use the appropriate OEM document for the installed series; do not assume that every A4VG56 has the same rear option. The PHP suffix is a supplier catalogue code. Similar-looking OEM suffixes are not a verified one-to-one cross-reference.
The main-pump pressure is not this part’s rating
The catalogue identifies couplers, not a tested operating envelope.
Rexroth’s original document describes an integrated auxiliary pump serving boost and pilot supply within the complete A4VG arrangement. [2] That function is distinct from the main closed-circuit high-pressure duty. Do not put the main pump’s 400/450 bar figures into a replacement charge-pump specification.
| Missing from reviewed listing | What to request |
|---|---|
| Displacement and flow | Confirmed component displacement and flow under stated speed, fluid and pressure conditions |
| Pressure/speed limits | Allowed operating range for the actual component and assembled configuration |
| Materials and geometry | Controlled specification, interfaces, tolerances and inspection records |
| Functional result | Item-linked test report with setup, conditions, measured values and agreed criteria |
The OEM sheet’s displacement values also remain OEM design information; they are not assigned to this replacement without PHP evidence. No reviewed data establishes efficiency, field life, measured noise, guaranteed fit or a performance advantage. Leave those fields unresolved rather than filling them with another pump’s numbers.
Define whether you are buying an assembly or loose parts
The range image is not a packing list.
Ask the quotation to identify the charge-pump assembly, front/rear couplers, seals, fasteners and any mating components separately. Confirm what is assembled, what is supplied loose and what must be reused. No universal included-parts list is established by the catalogue photo.
What does the advertised one-year warranty actually cover?
The supplier advertises one-year replacement-parts coverage, but the reviewed page does not set out the full terms. Obtain the starting event, provider, exclusions, claim evidence, return arrangements and remedy. Clarify responsibility if the confirmed configuration does not fit. Do not assume labour, consequential losses or expedited shipping are covered.
For an urgent order, obtain a dated stock/dispatch confirmation against the exact PHP code and agreed supply condition. “Volume stock” on the website is not evidence that your required configuration is ready to ship. Keep substitution approval explicit, particularly if an alternative rear arrangement is proposed.
Close the match, then inspect the delivered item
Keep supplier confirmation and physical acceptance separate.
- Before payment: agree code, drawing, supply scope, condition and compatibility confirmation against the installed pump evidence.
- Before dispatch: request identification photographs and the agreed dimensional/functional records for the offered item or batch.
- At receipt: compare code, mating details and packing contents with the approved documents; record discrepancies before installation.
- During qualified installation: use applicable machine/OEM service procedures, isolation, cleanliness and commissioning instructions. An enquiry page cannot authorise modification or diagnose system failure.
If the original assembly failed, replacing a charge component alone does not establish that the cause has been removed. Have qualified personnel investigate the system using the applicable service instructions. This is a specification-based purchasing comparison; CivilEquip has not bench-tested or fitted these components.
Request a confirmed A4VG56 configuration
Edit the identification and interface fields before sending.
Sources & review
- PHPFLUID original charge-pump table ↗
Four A4VG56 rows, code/coupler labels and unlabelled range photograph. Interchangeability and warranty are supplier claims, not independent verification.
2026-10-11 - Bosch Rexroth A4VG series 32 original technical document ↗
RE-E 92003/2021-08-11, 94 pages. Boost-pump and through-drive identification context; no transfer of OEM specifications or approval to the replacement.
2026-10-11
Specifications come from the manufacturer’s published information and the sources above; buying advice is written by CivilEquip with AI assistance. Ask the manufacturer to confirm the data for your configuration. Editorial policy · Report a correction.